I have been using zoom lenses for awhile and seem to forget about using prime lenses. Zoom lenses make things easy for a lazy man like myself by zooming in and out to get the picture framed just the way I want A prime lens, however, is different since each focal length is made for a specific function. I also need to find how to use the 2 Sigma lenses to determine what they are good for. Meanwhile. I just keep shooting and experiment......

I've been finding that I usually tend to change what I shoot according to what lens I happen to have, instead of considering the subject and getting out the "right" tool for the job. I've probably missed out on a lot of shots that way, but it's kind of fun too.

Anyhow, the 19 seems like a pretty good lens for "general purpose" type shooting. I imagine it'll be like the Panny 20 in that regard. I have to assume that the 1mm FOV difference isn't even noticeable. The big differences will probably be focus speed vs. lens speed.